budsmokeronly

Hello, Im putting together a simple bubbler and based on past headches want to implement a drain valve of some sort to make nutrient changes easier.
Any PROS want to give me a hand, I thought of a few ideas, but there always seems to be a hang-up. What type of parts would I need? Where would I install the drain valve, bottom or side? What is the best sealant to prevent leaks?
Any help is appreciated.

Mendrel

The best sealant (IMO) is none! If done correctly you shouldn't need any sealant. I prefer to have my drains in the side so I can set the tub down flat. And the little bit of water that stays in there (if you don't keep it filled ie: aero, fill & drain) isn't a problem for me. This works on Rubbermaids and I don't see why it can't work on buckets either. What I use is a 3/4" PVC slip to NPT (National Pipe Thread) through a 1" hole. The threads fit very snugly and need to be pushed through. On either side of the wall you are passing through, I put a rubber o-ring that fits the threads tightly (Viton O-rings will withstand the harsh conditions better than regular, but are more expensive and harder to find locally.) and doesn't slip over the threads. The o-ring thickness is usually best if it's of medium thickness. I put this galvanized metal ring on the outside ONLY (acid water and galvanized don't get along. Something about zinc leaching into the water.) Then I screw a threaded female hose connector over the threads, which have been teflon taped of course, and you're done.

In the pic you see the threaded male part with the o-ring. The horrible drawing is supposed to be where your wall is. On the other side is the second o-ring. You can see the metal ring with the divit in the center. This holds the o-ring in place. After taping the threads, you can screw on the female part and you're done. I added the prices so you could see about how much it costs you.

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airedog

I just used the through hull fitting on a bubbler bucket and attached a 2' length of flex hose. Just use 2 TieWraps to put a 180 degree bend in the top to keep light out. Works great for filling as well as draining. I've done the same to the totes I use for nursery bubblers.

Airedog